fotosensitiivisillä

Fotosensitiivisillä refers to individuals or materials that are sensitive to light. In a biological context, photosensitivity most commonly describes an increased sensitivity to ultraviolet (UV) radiation from the sun. This can manifest as exaggerated sunburn reactions, skin rashes, or other adverse dermatological responses upon even brief exposure to sunlight. People with certain genetic conditions, autoimmune diseases, or those taking specific medications can exhibit photosensitivity. For example, conditions like lupus or porphyria are known to cause photosensitivity, as are certain antibiotics and diuretics.

In a broader sense, photosensitive materials are those whose chemical or physical properties change when exposed to light. This principle is fundamental to photography, where light-sensitive emulsions on film or digital sensors record images. Artists and conservators also deal with photosensitive materials, as light can cause fading or degradation of pigments, dyes, and other substances over time. Therefore, protecting artwork and historical artifacts from excessive light exposure is crucial for their preservation. The term can also be applied to certain electronic components that react to light, influencing their conductivity or function. Understanding photosensitivity is important for both medical treatment and the protection of materials.